What is the purpose of a letter of instruction?

On Behalf of | May 6, 2026 | Estate Planning

A will and a trust often serve as the foundation of an estate plan, but they do not always capture everything your family may need to know. Below are the ways that a certain document can help your loved ones understand your motives behind your decisions.

Easing the burden on grieving loved ones

A letter of instruction generally covers the practical and personal information that formal estate planning documents leave out. This can range from a list of financial accounts and insurance policies to login credentials for online services and the location of important paperwork.

Beyond logistics, this document can include personal messages to family members or explanations behind specific decisions in your estate plan. You might clarify why you divided assets in a particular way or express wishes that do not fit neatly into legal language.

Some individuals also include information about ongoing obligations, such as subscriptions, business contacts or pet care instructions. The flexibility of this document means it can be as detailed or as brief as you see fit.

Filling gaps in a California estate plan

In California, a letter of instruction is not a legally binding document and does not override the terms of a will or trust. Courts will not enforce its contents during probate, and it cannot transfer property or name beneficiaries.

However, it can serve as a valuable companion to your formal estate plan. Executors and trustees often rely on practical guidance when administering an estate. A letter can point them toward the information they need without requiring them to search through multiple files or contact various institutions.

State law requires certain steps during probate administration, including notifying creditors and filing inventories with the court. A letter of instruction does not satisfy any of those legal requirements, but it can make the process more manageable for the person carrying them out.

Because you do not file this document with the court, it remains private. That distinction can matter if you want to share sensitive information without making it part of the public record.

Revisiting the document as life changes

A letter of instruction is most useful when it reflects your current circumstances, which means creating one early and revisiting it regularly is a practical approach. Major life events such as a marriage, a divorce, birth of a child or purchase of a new property are all good reasons to review and revise the document.

An attorney can help you draft one and coordinate it with the rest of your estate plan. Keeping a copy with your will or trust and letting your executor or a trusted family member know where to find it can make a significant difference when the time comes.